1 files changed, 58 insertions, 0 deletions
diff --git a/chromeos/binder_watcher.cc b/chromeos/binder_watcher.cc
new file mode 100644
index 0000000..30e7754
--- /dev/null
+++ b/chromeos/binder_watcher.cc
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <chromeos/binder_watcher.h>
+
+#include <base/logging.h>
+#include <binder/IPCThreadState.h>
+#include <binder/ProcessState.h>
+
+using android::IPCThreadState;
+using android::ProcessState;
+
+namespace chromeos {
+
+BinderWatcher::BinderWatcher() = default;
+
+BinderWatcher::~BinderWatcher() = default;
+
+bool BinderWatcher::Init() {
+  int binder_fd = -1;
+  ProcessState::self()->setThreadPoolMaxThreadCount(0);
+  IPCThreadState::self()->disableBackgroundScheduling(true);
+  IPCThreadState::self()->setupPolling(&binder_fd);
+  LOG(INFO) << "Got binder FD " << binder_fd;
+  if (binder_fd < 0)
+    return false;
+
+  if (!base::MessageLoopForIO::current()->WatchFileDescriptor(
+          binder_fd, true /* persistent */, base::MessageLoopForIO::WATCH_READ,
+          &watcher_, this)) {
+    LOG(ERROR) << "Failed to watch binder FD";
+    return false;
+  }
+  return true;
+}
+
+void BinderWatcher::OnFileCanReadWithoutBlocking(int fd) {
+  IPCThreadState::self()->handlePolledCommands();
+}
+
+void BinderWatcher::OnFileCanWriteWithoutBlocking(int fd) {
+  NOTREACHED() << "Unexpected writable notification for FD " << fd;
+}
+
+}  // namespace chromeos